Display device and electronic apparatus

ABSTRACT

There is provided a display device including a plurality of unit regions disposed adjacent to each other, a first region that is provided in each of the unit regions, and emits first light, and a second region that is provided outside the first region in each of the unit regions, and emits second light. The second light is different from the first light in at least one of luminance, wavelength, or surface-reflection component, the second regions are provided between adjacent ones of the first regions, and a difference in luminance, wavelength, or surface-reflection component between the second light to be emitted from adjacent ones of the unit regions is smaller than a difference in luminance, wavelength, or surface-reflection component between the first light and the second light in a same one of the unit regions.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 16/617,292, filed on Nov. 26, 2019, which is a U.S.National Phase of International Patent Application No. PCT/JP2018/017590filed on May 7, 2018, which claims priority benefit of Japanese PatentApplication No. JP 2017-110597 filed in the Japan Patent Office on Jun.5, 2017. Each of the above-referenced applications is herebyincorporated herein by reference in its entirety.

TECHNICAL FIELD

The present technology relates to a display device that is applicableto, for example, a tiling display or the like, and to an electronicapparatus.

BACKGROUND ART

Self-emitting display panels using a light-emitting element such as alight-emitting diode (LED: Light-Emitting Diode) has been developed (forexample, see PTL 1). It is proposed to configure a tiling display (adisplay device) by linking a plurality of such self-emitting displaypanels together.

CITATION LIST Patent Literature

PTL 1: Japanese Unexamined Patent Application Publication No. 2015-92529

SUMMARY OF THE INVENTION

In such a display device, enhancement of image quality is desired.

It is therefore desirable to provide a display device and an electronicapparatus that allow for enhancement of image quality.

A display device according to an embodiment of the present technologyincludes: a plurality of unit regions disposed adjacent to each other; afirst region that is provided in each of the unit regions, and emitsfirst light; and a second region that is provided outside the firstregion in each of the unit regions, and emits second light, the secondlight being different from the first light in at least one of luminance,wavelength, or surface-reflection component. The second regions areprovided between adjacent ones of the first regions, and a difference inluminance, wavelength, or surface-reflection component between thesecond light to be emitted from adjacent ones of the unit regions issmaller than a difference in luminance, wavelength, orsurface-reflection component between the first light and the secondlight in a same one of the unit regions.

An electronic apparatus according to an embodiment of the presenttechnology includes the display device according to the embodiment ofthe present technology.

In the display device or the electronic apparatus according to theembodiment of the present technology, in the vicinity of a portion wherethe unit regions are in contact with each other, the second light havingmutually close optical characteristics is emitted from the respectivesecond regions in the unit regions; therefore, an optical border betweenthe unit regions is less likely to be recognized.

According to the display device and the electronic apparatus of theembodiments of the present technology, in the vicinity of a portionwhere the unit regions are in contact with each other, the second lighthaving mutually close optical characteristics is emitted from therespective second regions in the unit regions; therefore, an opticalborder between the unit regions is less likely to be recognized. Thismakes it possible to enhance the image quality. It is to be noted thateffects described above are not necessarily limitative, and any ofeffects described in the present disclosure may be provided.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is an exploded perspective view of a schematic configuration of adisplay device according to a first embodiment of the presenttechnology.

FIG. 2 is a perspective view of a schematic configuration of an elementsubstrate illustrated in FIG. 1.

FIG. 3 is a perspective view of a schematic configuration of a unitillustrated in FIG. 2.

FIG. 4 is a schematic cross-sectional view of a schematic configurationof a unit illustrated in FIG. 3.

FIG. 5 is a schematic plan view of a schematic configuration of each ofa plurality of display panels illustrated in FIG. 3.

FIG. 6A is an enlarged schematic plan view of two adjacent displaypanels of the plurality of display panels illustrated in FIG. 5.

FIG. 6B is a schematic diagram of a cross-sectional configuration takenalong a line B-B illustrated in FIG. 6A.

FIG. 7 is an explanatory diagram describing a viewing distance.

FIG. 8 is a schematic plan view of a configuration of a main portion ofa display device according to a comparative example.

FIG. 9 is a diagram illustrating wavelengths of first light and secondlight to be emitted from a first region and a second region illustratedin FIG. 6A.

FIG. 10 is a schematic plan view of a configuration of a main portion ofa display device according to a second embodiment of the presenttechnology.

FIG. 11 is an enlarged schematic plan view of two adjacent units of aplurality of units illustrated in FIG. 10.

FIG. 12 is a diagram illustrating wavelengths of first light and secondlight to be emitted from a first region and a second region illustratedin FIG. 11.

FIG. 13 is a perspective view of an appearance of an electronicapparatus (a television apparatus) according to an application example.

FIG. 14 is a schematic plan view of another example (1) of dispositionof a second region illustrated in FIG. 5.

FIG. 15 is a schematic plan view of another example (2) of dispositionof the second region illustrated in FIG. 5.

MODES FOR CARRYING OUT THE INVENTION

Hereinafter, some embodiments of the present technology will bedescribed in detail with reference to the drawings. It is to be notedthat descriptions are given in the following order.

1. First Embodiment (a display device provided with a first region and asecond region for each of display panels)

2. Modification Example 1 (an example in which luminance of first lightand luminance of second light are different from each other)

3. Modification Example 2 (an example in which a surface-reflectioncomponent of first light and a surface-reflection component of secondlight are different from each other)

4. Second Embodiment (a display device provided with a first region anda second region for each of units)

5. Application Example (an electronic apparatus)

1. First Embodiment

FIG. 1 schematically illustrates an overall configuration of a displaydevice (a display device 1) according to a first embodiment of thepresent technology. The display device 1 includes, for example, anelement substrate 1A, a counter substrate 1B opposed to the elementsubstrate 1A, and a control circuit 1C that drives the element substrate1A. For example, a front surface of the counter substrate 1B (a surfaceon a side opposite to a surface opposed to the element substrate 1A) isan image display surface, a middle portion of the image display surfaceis a display region, and a peripheral portion of the image displaysurface is a non-display region. The counter substrate 1B allows lightwith a wavelength of a visible region to pass therethrough. The countersubstrate 1B includes a light transmissive material such as a glasssubstrate, a transparent resin substrate, and a transparent resin film,for example.

FIG. 2 schematically illustrates an example of a configuration of theelement substrate 1A illustrated in FIG. 1. The display device 1 is aso-called tiling display, and the element substrate 1A includes aplurality of units (units U) that are laid in a tiled pattern. FIG. 2illustrates an example in which the element substrate 1A includes thenine units U; however, the number of units U may be ten or more, or maybe eight or less.

FIG. 3 schematically illustrates an example of a configuration of theunit U. The unit U has, for example, a plurality of display panels(display panels 10) that are laid in a tiled pattern, and a supportsubstrate (a support substrate 20) for these display panels 10. Asurface on a side opposite to a display surface of each of the displaypanels 10 is opposed to the support substrate 20. The support substrate20 includes, for example, a metallic plate.

FIG. 4 schematically illustrates an example of a configuration betweenthe display panels 10 and the support substrate 20. The display panels10 are fixed to the support substrate 20 with use of, for example,fixing members (fixing members 30).

FIG. 5 illustrates a schematic planar configuration of each of thedisplay panels 10. Each of the display panels 10 is provided with afirst region 10A in a middle portion, and a second region 10B outsidethe first region 10A. A planar shape of the first region 10A is, forexample, a square, and a planar shape of the second region 10B is aframe-like square surrounding the first region 10A. The planar shapes ofthe first region 10A and the second region 10B may be any shapes otherthan the square. For example, areas of the first regions 10A that areprovided in the respective display panels 10 are equal to each other,and areas of the second regions 10B that are provided in the respectivedisplay panels 10 are equal to each other. The display panel 10 may bepresent in which the area of the first region 10A or the second region10B is different from the area of any of other first regions 10A orsecond regions 10B. The second regions 10B are provided between adjacentones of the first regions 10A. Here, the second regions 10B are incontact with each other between the adjacent ones of the display panels10. Here, the display panel 10 corresponds to a specific example of a“unit region” in the present technology.

FIG. 6A illustrates, in an enlarged manner, two adjacent display panels10 (a display panel 10-1 and a display panel 10-2) of the plurality ofdisplay panels 10 illustrated in FIG. 5. FIG. 6B illustrates across-sectional configuration taken along a line B-B illustrated in FIG.6A. Each of the display panel 10-1 (a first unit region) and the displaypanel 10-2 (a second unit region) has, on a mounting substrate 11, aplurality of light-emitting elements (first light-emitting elements 12Aand second light-emitting elements 12B) and a light-shielding layer (ablack layer) 13. The first region 10A of each of the display panel 10-1and the display panel 10-2 has the plurality of first light-emittingelements 12A on the mounting substrate 11, and the second region 10B ofeach of the display panel 10-1 and the display panel 10-2 has theplurality of second light-emitting elements 12B on the mountingsubstrate 11. The first light-emitting element 12A and the secondlight-emitting element 12B are disposed for each of pixels P, and eachof these light-emitting elements is coupled to a drive circuit, forexample. The plurality of pixels P is disposed, for example, in a matrixpattern over the first region 10A and the second region 10B.

The mounting substrate 11 includes, for example, a plate-shaped memberthat includes glass or the like, and a wiring layer that drives thefirst light-emitting element 12A and the second light-emitting element12B. The plate-shaped member may include a resin material or a metallicmaterial having a front surface subjected to insulating treatment.

The first light-emitting elements 12A and the second light-emittingelements 12B include, for example, light-emitting diodes (LEDs:Light-Emitting Diodes). The first light-emitting elements 12A and thesecond light-emitting elements 12B each preferably include, for example,a micro LED having a size W12 on a side of about several hundred μm, forexample. The use of the micro LED for each of the first light-emittingelements 12A and the second light-emitting elements 12B makes itpossible to achieve the high-definition display panel 10. Further, thisallows for enhancement of contrast. At this time, it is preferable that,for example, a size WP on a side of the pixel P be within a range of 0.2mm to 4 mm, and an area occupied by the first light-emitting element 12Aor the second light-emitting element 12B relative to the area of thesingle pixel P be 10% or less.

First light LA is emitted from each of the first light-emitting elements12A, and second light LB is emitted from each of the secondlight-emitting elements 12B. In the display panel 10-1, for example, anaverage wavelength of the first light LA to be emitted from the firstregion 10A (a first region 10AS) is shorter than an average wavelengthof the second light LB to be emitted from the second region 10B, and adifference between the average wavelength of the first light LA and theaverage wavelength of the second light LB is within 2 nm. In the displaypanel 10-2, for example, the average wavelength of the first light LA tobe emitted from the first region 10A (a first region 10AL) is longerthan the average wavelength of the second light LB to be emitted fromthe second region 10B, and a difference between the average wavelengthof the first light LA and the average wavelength of the second light LBis within 2 nm.

In the present embodiment, a difference between the average wavelengthsof the second light LB to be emitted from the respective second regions10B in the adjacent display panels 10-1 and 10-2 is smaller than adifference between the average wavelength of the first light LA and theaverage wavelength of the second light LB in each of the display panels10-1 and 10-2. The average wavelengths of the second light LB to beemitted from the respective second regions 10B in the adjacent displaypanels 10-1 and 10-2 are, for example, substantially the same. Here, theaverage wavelengths of the second light LB to be emitted from therespective second regions 10B in the adjacent display panels 10-1 and10-2 being substantially the same means that the average wavelengths arethe same to such a degree that it is possible to exhibit an effectthereof even though some manufacturing errors, sorting errors, etc. areincluded. As will hereinafter be described in detail, this suppressesgeneration of a visual border between the display panel 10-1 and thedisplay panel 10-2.

In other words, in the display panels 10-1 and 10-2, the firstlight-emitting element 12A and the second light-emitting element 12B aresorted depending on emission wavelengths of light-emitting elementsafter manufacturing to be disposed in any of the first region 10A andthe second region 10B. For example, a light-emitting element (the firstlight-emitting element 12A) that emits light of a shorter wavelength(the first light LA) is disposed in the first region 10AS of the displaypanel 10-1, and a light-emitting element (the first light-emittingelement 12A) that emits light of a longer wavelength (the first lightLA) is disposed in the first region 10AL of the display panel 10-2.Light-emitting elements (the second light-emitting elements 12B) thatemit light of a wavelength between the shorter wavelength and the longerwavelength (the second light LB) are disposed in the second regions 10Bof the display panels 10-1 and 10-2.

For example, a length DA on a side of the square-shaped first region 10Ais within the range of 7 cm to 26 cm, and a width DB of the frame-shapedsecond region 10B is within the range of 3 cm to 5 cm. As illustrated inFIG. 7, a relationship between a viewing distance VD from a viewer tothe display panel 10 and the width DB preferably satisfies the followingexpression (1). If the viewing distance VD and the width DB satisfy arelationship of the expression (1), it is possible to surely suppressgeneration of the visual border between the display panel 10-1 anddisplay panel 10-2 adjacent to each other.

DB>2VD×tan(3°/2)/2  (1)

Note that the expression (1) is applied in a case where a size (DA+2DB)on a side of the display panel 10 is smaller than a viewing angleanomaly occurrence size (2VD×tan (3°/2)/2).

The first light LA and the second light LB are, for example, light of ablue wavelength band. For example, the average wavelength of the firstlight LA to be emitted from the first region 10AS of the display panel10-1 is 462 nm, and the average wavelength of the first light LA to beemitted from the first region 10AL of the display panel 10-2 is 466 nm.The average wavelength of the second light LB to be emitted from thesecond region 10B of each of the display panels 10-1 and 10-2 is 464 nm.The display panel 10 is provided with a light-emitting element thatemits light of a red wavelength band, a light-emitting element thatemits light of a green wavelength band, and a light-emitting elementthat emits light of the blue wavelength band, and performs chromaticitycorrection between the adjacent display panels 10-1 and 10-2.

Each of the first light-emitting element 12A and the secondlight-emitting element 12B has, for example, a first electricalconductivity-type (p-type) semiconductor layer, an active layer, and asecond electrical conductivity-type (n-type) semiconductor layer, andthe active layer is disposed between the first electricalconductivity-type semiconductor layer and the second electricalconductivity-type semiconductor layer. It is possible to use, forexample, an InGaN-based semiconductor material for the first electricalconductivity-type semiconductor layer, the active layer, and the secondelectrical conductivity-type semiconductor layer.

The first light LA and the second light LB may be, for example, light ofthe red wavelength band or light of the green wavelength band. The firstelectrical conductivity-type semiconductor layer, the active layer, andthe second electrical conductivity-type semiconductor layer thatconfigure the first light-emitting element 12A and the secondlight-emitting element 12B may include an AlGaInP-based semiconductormaterial.

The first light-emitting element 12A and the second light-emittingelement 12B are formed using, for example, a transfer technique in thefollowing manner. First, respective semiconductor layers included in thefirst light-emitting element 12A and the second light-emitting element12B is epitaxially grown in order on a growth substrate, and thereaftereach of the semiconductor layers is shaped in a desired size. Next, thefirst light-emitting element 12A and the second light-emitting element12B are formed by transferring the shaped semiconductor layers ontoanother substrate from the growth substrate. The transfer is performedusing, for example, a physical pickup method or a laser peeling method.On the substrate on which the semiconductor layers are transferred, forexample, light-emitting elements (including the first light-emittingelement 12A and the second light-emitting element 12B) that emit lightof each color are disposed at a predetermined pitch. Forming the firstlight-emitting element 12A and the second light-emitting element 12Bwith use of the transfer technique makes it possible to enhancewavelength uniformity of the first light LA and the second light LB thatare emitted from the first light-emitting element 12A and the secondlight-emitting element 12B.

The light-shielding layer 13 is opposed to the mounting substrate 11with the first light-emitting element 12A and the second light-emittingelement 12B interposed therebetween. The light-shielding layer 13 has anopening 13M at a position opposed to each of the first light-emittingelement 12A and the second light-emitting element 12B, and the firstlight LA and the second light LB are extracted through the opening 13M.The light-shielding layer 13 includes, for example, a resin materialcontaining a black additive such as carbon. Examples of the resinmaterial include acrylic resin, epoxy-based resin, urethane-based resin,silicone-based resin, cyanoacrylate-based resin, etc. Thelight-shielding layer 13 is covered with, for example, a resin layer orthe like, and the first light LA and the second light LB are extractedfrom the opening 13M of the light-shielding layer 13 through the resinlayer or the like.

In the display device 1, on the basis of an image signal that isinputted externally, the control circuit 1C supplies a drive current(outputs a drive signal) to each of the pixels P of the display panel10. In each of the pixels P, the first light-emitting element 12A andthe second light-emitting element 12B emit light with predeterminedluminance on the basis of the supplied drive current. In the presentembodiment, each of the display panels 10 is provided with the firstregion 10A and the second region 10B, and the second region 10B isprovided between the adjacent first regions 10A (the first regions 10ASand 10AL in FIG. 6A). Here, the adjacent display panels 10 (the displaypanels 10-1 and 10-2 in FIG. 6A) are in contact with each other with therespective second regions 10B interposed therebetween. The averagewavelengths of the second light LB to be emitted from the respectivesecond regions 10B in the adjacent display panels 10 are substantiallythe same. This suppresses generation of the visual border between theadjacent display panels 10. Hereinafter, this is described in detail.

FIG. 8 illustrates a planar configuration in which two display panels(display panels 100AS and 100AL) according to a comparative example aredisposed side by side. None of the display panels 100AS and 100AL hasthe first region and the second region (the first region 10A and thesecond region 10B in FIG. 5 or the like), and light to be emitted fromany region in the display panels 100AS and 100AL has the substantiallysame wavelength. For example, the average wavelength of light to beemitted from the display panel 100AS is 462 nm, and the averagewavelength of light to be emitted from the display panel 100AL is 466nm. A wavelength of light to be emitted from light-emitting elementsvaries for each of manufacturing lots; therefore, light-emittingelements are combined in manufacturing order, resulting in formation ofthe display panels 100AS and 100AL in which such average wavelengths ofoutput light are different from each other.

In such a display panel 100AS and such a display panel 100AL, it ispossible to match chromaticity of the display panel 100AS andchromaticity of the display panel 100AL with each other by performingchromaticity correction of red (R), green (G), and blue (B). However,there is a possibility that a visual border between the display panel100AS and the display panel 100AL caused due to a difference in theaverage wavelength of the output light is generated. Such a visualborder is a border caused by a retinal phenomenon, a border caused bychromatic aberration, or the like. Generation of such a visual borderdegrades image quality significantly.

A method of sorting light-emitting elements for use depending on anemission wavelength is also considered. Examples of the sorting methodinclude bin sorting. However, using sorted light-emitting elementsinvolves disposal of unusable light-emitting elements, resulting inincreased costs.

In contrast, in the display device 1, each of the display panels 10 isprovided with the second region 10B, and the second regions 10B aredisposed between the adjacent first regions 10AS and 10AL. Specifically,here, the display panels 10 come in contact with each other with thesecond regions 10B interposed therebetween. Consequently, in thevicinity of a portion where the display panels 10 are in contact witheach other, the second light LB having the substantially same averagewavelength is emitted from the respective second regions 10B, whichsuppresses generation of the visual border between the adjacent displaypanels 10. This allows for enhancement of image quality.

Further, in each of the display panels 10, the first region 10A isprovided inside the second region 10B, which makes it possible to usethe first light-emitting element 12A that emits light (the first lightLA) of a wavelength shifted from a wavelength of the second light LBwithout discarding such a first light-emitting element 12A. This allowsfor cost reduction.

FIG. 9 illustrates an example of a wavelength distribution in a casewhere the plurality of display panels 10 are disposed adjacently. Asseen from the figure, wavelengths vary in a stepwise manner between thefirst region 10A (the first regions 10AS and 10AL) and the second region10B. A difference between the average wavelength of the first light LAto be emitted from the first region 10A and the average wavelength ofthe second light LB to be emitted from the second region 10B is, forexample, within 2 nm, and the visual border is not generated betweensuch display panels 10.

As described above, in the present embodiment, the second regions 10Bare provided between the adjacent first regions 10AS and 10AL, and theaverage wavelengths of the second light LB to be emitted from therespective second regions 10B are substantially the same, which makes itpossible to suppress generation of the visual border between theadjacent display panels 10. This allows for enhancement of imagequality.

Further, the first region 10A is provided inside the second region 10Bof each of the display panels 10, which makes it possible to effectivelyuse also the first light-emitting element 12A that emits the first lightLA of a wavelength different from a wavelength of the second light LB.This allows for cost reduction.

In addition, even if a detect takes place in one of the display panels10, and replacement of such a display panel 10 is performed, thenecessity for use of the selected display panel 10 is eliminated. Inother words, it is possible to easily carry out repairs. The same istrue for a case where replacement of the single unit U is performed.

Hereinafter, description is given of modification examples of theforegoing first embodiment and another embodiment; however, in thefollowing descriptions, same components as those in the foregoing firstembodiment are denoted by same reference numerals, and the relateddescriptions are omitted as appropriate.

Modification Example 1

Luminance of first light L1 to be emitted from the first light-emittingelement 12A and luminance of second light L2 to be emitted from thesecond light-emitting element 12B may be different from each other. Inother words, the average luminance of the first light L1 to be emittedfrom the first region 10A and the average luminance of the second lightL2 to be emitted from the second region 10B may be different from eachother. At this time, a difference in the average luminance between thesecond light LB to be emitted from the second regions 10B in theadjacent display panels 10 is smaller than a difference between theaverage luminance of the first light LA and the average luminance of thesecond light LB in each of the display panels 10. Even in such a case,it is possible to obtain effects similar to those of the foregoing firstembodiment.

Modification Example 2

A surface-reflection component of the first light L1 to be emitted fromthe first light-emitting element 12A and a surface-reflection componentof the second light L2 to be emitted from the second light-emittingelement 12B may be different from each other. In other words, theaverage surface-reflection component of the first light L1 to be emittedfrom the first region 10A and the average surface-reflection componentof the second light L2 to be emitted from the second region 10B may bedifferent from each other. At this time, a difference in the averagesurface-reflection component between the second light LB to be emittedfrom the second regions 10B in the adjacent display panels 10 is smallerthan a difference between the average surface-reflection component ofthe first light LA and the average surface-reflection component of thesecond light LB in each of the display panels 10. It is sufficient ifthe first light L1 to be emitted from the first region 10A and thesecond light L2 to be emitted from the second region 10B are differentin at least one of the average luminance, the average wavelength, or theaverage surface-reflection component. Even in such a case, it ispossible to obtain effects similar to those of the foregoing firstembodiment.

Second Embodiment

FIG. 10 illustrates a schematic planar configuration of a display device(a display device 2) according to a second embodiment of the presentdisclosure. As seen from the figure, a single unit U may be providedwith a first region (a first region UA) and a second region (a secondregion UB). Except for this point, the display device 2 hasconfigurations and effects similar to those of the display device 1according to the foregoing first embodiment. Each of the units U isprovided with the first region UA in a middle portion, and the secondregion 10B outside the first region UA. A planar shape of the firstregion UA is, for example, a square, and a planar shape of the secondregion UB is a frame-like square surrounding the first region UA. Theplanar shapes of the first region UA and the second region UB may be anyshapes other than the square. The second regions UB are provided betweenthe adjacent first regions UA. Here, the second regions UB have contactwith each other between adjacent ones of the units U. Here, the unit Ucorresponds to a specific example of a “unit region” in the presenttechnology.

FIG. 11 illustrates, in an enlarged manner, two adjacent units U (a unitU-1 and a unit U-2) of the plurality of units U illustrated in FIG. 10.In the units U-1 (a first unit region) and U-2 (a second unit region),the first region UA includes, for example, the single display panel 10.The first region UA may include a plurality of display panels 10. Thesecond region UB in each of the units U-1 and U-2 includes a pluralityof display panels 10. In the unit U-1, for example, an averagewavelength of the first light LA (see FIG. 6B) to be emitted from thefirst region UA (a first region UAS) is shorter than an averagewavelength of the second light LB (see FIG. 6B) to be emitted from thesecond region UB, and a difference between the average wavelength of thefirst light LA and the average wavelength of the second light LB iswithin 2 nm. In the unit U-2, for example, the average wavelength of thefirst light LA to be emitted from the first region UA (a first regionUAL) is longer than the average wavelength of the second light LB to beemitted from the second region UB, and a difference between the averagewavelength of the first light LA and the average wavelength of thesecond light LB is within 2 nm.

In the present embodiment, a difference between the average wavelengthsof the second light LB to be emitted from the respective second regionsUB in the adjacent units U-1 and U-2 is smaller than a differencebetween the average wavelength of the first light LA and the averagewavelength of the second light LB in each of the units U-1 and U-2. Theaverage wavelengths of the second light LB to be emitted from therespective second regions 10B in the adjacent units U-1 and U-2 are, forexample, substantially the same. As described in the foregoing firstembodiment, this suppresses generation of a visual border between theunit U-1 and the unit U-2. Further, the expression (1) given in theforegoing first embodiment is also applicable to a relationship betweenthe viewing distance VD and a width of the second region UB.

FIG. 12 illustrates an example of a wavelength distribution in a casewhere the plurality of units U are disposed adjacently. As seen from thefigure, wavelengths vary in a stepwise manner between the first regionUA (the first regions UAS and UAL) and the second region UB. Adifference between the average wavelength of the first light LA to beemitted from the first region UA and the average wavelength of thesecond light LB to be emitted from the second region UB is, for example,within 2 nm, and the visual border is not generated between such unitsU.

As in the display device 2, the first region UA and the second region UBmay be provided for each of the units U. Even in such a case, it ispossible to obtain effects similar to those of the foregoing firstembodiment. Further, even if a detect takes place in one of the units U,and replacement of such a unit U is performed, the necessity for use ofthe selected unit U is eliminated. In other words, it is possible toeasily carry out repairs. If a detect takes place in one of the displaypanels 10, and replacement of such a display panel 10 is performed, itis necessary to sort the display panels 10 depending on which one of thefirst region UA and the second region UB such a display panel 10includes.

As described in the foregoing modification examples 1 and 2, the averageluminance or the surface-reflection component of the first light LA tobe emitted from the first region UA and the average luminance or thesurface-reflection component of the second light LB to be emitted fromthe second region UB may be different from each other.

Application Example

Any of the display devices 1 and 2 described in the foregoing first andsecond embodiments, etc. is applicable to electronic apparatuses inevery field that display image signals to be inputted externally orinternally generated image signals as images or pictures. Examples ofthe electronic apparatuses include a television apparatus, a digitalcamera, a notebook personal computer, a mobile terminal such as a mobilephone, and a video camera. One of the examples is described below.

FIG. 13 illustrates an appearance of a television apparatus to which anyof the display devices 1 and 2 according to the foregoing first andsecond embodiments is applied. This television apparatus has, forexample, an image display screen section 300 including a front panel 310and a filter glass 320, and any of the above-described display devices 1and 2 is used in the image display screen section 300.

Although the present technology has been described above referring tothe embodiments and the modification examples, the present technology isnot limited to these embodiment, etc., and may be modified in a varietyof ways. For example, a material, a thickness and the like of each ofcomponents described in the foregoing embodiments, etc. are notlimitative, and any other materials and thicknesses may be used.

Further, each of the first light-emitting elements 12A and the secondlight-emitting elements 12B may include an organic light-emitting diode(OLED: Organic Light-Emitting Diode). Alternatively, the display devices1 and 2 may be liquid crystal display devices.

Moreover, the display devices 1 and 2 may be provided with a QD (QuantumDot) filter.

Further, each of the first regions 10A and UA may be divided into two ormore regions in accordance with the wavelength, the luminance, or thesurface-reflection component of the first light LA.

In addition, as illustrated in FIGS. 14 and 15, the second region 10B(or the second region UB) may not surround an entire circumference ofthe first region 10A (or the first region UA). For example, the secondregion 10B may be disposed in a U-shape on three outer sides of thefirst region 10A (FIG. 14), or the second region 10B may be disposed ina L-shape on two outer sides of the first region 10A (FIG. 15).

It is to be noted that the effects described herein are merelyillustrative and limitative, and the effects of the present disclosuremay be other effects, or there may be achieved other effects.

It is to be noted that the present technology may have the followingconfigurations.

(1)

A display device including:

a plurality of unit regions disposed adjacent to each other;

a first region that is provided in each of the unit regions, and emitsfirst light; and

a second region that is provided outside the first region in each of theunit regions, and emits second light, the second light being differentfrom the first light in at least one of luminance, wavelength, orsurface-reflection component,

the second regions being provided between adjacent ones of the firstregions, and a difference in luminance, wavelength, orsurface-reflection component between the second light to be emitted fromadjacent ones of the unit regions being smaller than a difference inluminance, wavelength, or surface-reflection component between the firstlight and the second light in a same one of the unit regions.

(2)

The display device according to (1), in which a wavelength of the secondlight is different from a wavelength of the first light.

(3)

The display device according to (2), in which wavelengths of the secondlight to be emitted from the respective unit regions are substantiallysame.

(4)

The display device according to (2) or (3), in which a differencebetween the wavelength of the second light and the wavelength of thefirst light in a same one of the unit regions is 2 nm or less.

(5)

The display device according to any one of (2) to (4), in which

the plurality of unit regions includes a first unit region and a secondunit region,

in the first unit region, the wavelength of the first light is shorterthan the wavelength of the second light, and

in the second unit region, the wavelength of the first light is longerthan the wavelength of the second light.

(6)

The display device according to any one of (1) to (5), in which thesecond region in each of the unit regions is provided to surround thefirst region.

(7)

The display device according to any one of (1) to (6), in which

a plurality of display panels laid in a tiled pattern is included, and

each of the display panels is provided with the first region and thesecond region.

(8)

The display device according to (7), further including a light-shieldinglayer provided in each of the display panels, in which

the first light and the second light are extracted through an opening ofthe light-shielding layer.

(9)

The display device according to (7) or (8), further including:

a plurality of first light-emitting elements provided in the firstregion of each of the unit regions; and

a plurality of second light-emitting elements provided in the secondregion of each of the unit regions.

(10)

The display device according to (9), in which the first light-emittingelements and the second light-emitting elements each include a micro LED(Light-Emitting Diode).

(11)

The display device according to (9) or (10), in which

the first light-emitting element and the second light-emitting elementare disposed for each of pixels provided in the first region and thesecond region, and

an area occupied by the first light-emitting element or the secondlight-emitting element relative to an area of each of the pixels is 10%or less.

(12)

The display device according to any one of (1) to (6), in which

a plurality of units laid in a tiled pattern is included, each of theplurality of units including a plurality of display panels, and

each of the units is provided with the first region and the secondregion.

(13)

The display device according to any one of (1) to (12), in which thefirst light and the second light include light of a blue wavelengthband.

(14)

The display device according to any one of (1) to (13), in which thesecond regions are in contact with each other in adjacent ones of theunit regions.

(15)

An electronic apparatus provided with a display device, the displaydevice including:

a plurality of unit regions disposed adjacent to each other;

a first region that is provided in each of the unit regions, and emitsfirst light; and

a second region that is provided outside the first region in each of theunit regions, and emits second light, the second light being differentfrom the first light in at least one of luminance, wavelength, orsurface-reflection component,

the second regions being provided between adjacent ones of the firstregions, and a difference in luminance, wavelength, orsurface-reflection component between the second light to be emitted fromadjacent ones of the unit regions being smaller than a difference inluminance, wavelength, or surface-reflection component between the firstlight and the second light in a same one of the unit regions.

This application claims the priority on the basis of Japanese PatentApplication No. 2017-110597 filed on Jun. 5, 2017 with Japan PatentOffice, the entire contents of which are incorporated in thisapplication by reference.

It should be understood by those skilled in the art that variousmodifications, combinations, sub-combinations, and alterations may occurdepending on design requirements and other factors insofar as they arewithin the scope of the appended claims or the equivalents thereof.

What is claimed is:
 1. A display device, comprising: a plurality of unitregions, wherein the plurality of unit regions comprises a first unitregion and a second unit region adjacent to the first unit region, eachof the first unit region and the second unit region comprises a firstregion and a second region, the first region is configured to emit afirst light, the second region is outside the first region in each ofthe first unit region and the second unit region, the second region isconfigured to emit a second light, the second light is different fromthe first light in at least one of luminance, wavelength, orsurface-reflection component, the second region of the first unit regionand the second region of the second unit region are between adjacentfirst regions of the plurality of unit regions, and a first differencein one of luminance, wavelength, or surface-reflection component betweenthe second light to be emitted from adjacent unit regions of theplurality of unit regions is smaller than a second difference in arespective one of luminance, wavelength, or surface-reflection componentbetween the first light and the second light in a same unit region ofthe plurality of unit regions.
 2. The display device according to claim1, wherein a wavelength of the second light is different from awavelength of the first light.
 3. The display device according to claim2, wherein the wavelength of the second light emitted from the secondregion of each of the first unit region and the second unit region issubstantially same.
 4. The display device according to claim 2, whereina difference between the wavelength of the second light and thewavelength of the first light emitted from one of the first unit regionor the second unit region is 2 nm or less.
 5. The display deviceaccording to claim 2, wherein in the first unit region, the wavelengthof the first light is shorter than the wavelength of the second light,and in the second unit region, the wavelength of the first light islonger than the wavelength of the second light.
 6. The display deviceaccording to claim 1, wherein the second region surrounds the firstregion in each of the first unit region and the second unit region. 7.The display device according to claim 1, wherein the plurality of unitregions are display panels laid in a tiled pattern.
 8. The displaydevice according to claim 7, further comprising a light-shielding layerin each of the plurality of unit regions, wherein the first light andthe second light are extracted through an opening of the light-shieldinglayer.
 9. The display device according to claim 7, further comprising: afirst light-emitting element in the first region of each of the firstunit region and the second unit region; and a second light-emittingelement in the second region of each of the first unit region and thesecond unit region.
 10. The display device according to claim 9, whereineach of the first light-emitting element and the second light-emittingelement comprises a micro light-emitting diode (LED).
 11. The displaydevice according to claim 9, further comprising a plurality of pixels ineach of the first region and the second region, wherein the firstlight-emitting element corresponds to each of the plurality of pixels ofthe first region, the second light-emitting element corresponds to eachof the plurality of pixels of the second region, and an area occupied byone of the first light-emitting element or the second light-emittingelement relative to an area of each of the plurality of pixels is 10% orless.
 12. The display device according to claim 1, wherein each of thefirst light and the second light comprises light of a blue wavelengthband.
 13. The display device according to claim 1, wherein the secondregion of the first unit region is in contact with the second region ofthe second unit region.
 14. The display device according to claim 1,wherein the second region surrounds an entire circumference of the firstregion.
 15. The display device according to claim 1, wherein the firstregion includes four outer sides, and the second region covers two ofthe four outer sides of the first region.
 16. The display deviceaccording to claim 1, wherein the first region includes four outersides, and the second region covers three of the four outer sides of thefirst region.
 17. An electronic apparatus, comprising: a display device,wherein the display device includes: a plurality of unit regions,wherein the plurality of unit regions comprises a first unit region anda second unit region adjacent to the first unit region, each of thefirst unit region and the second unit region comprises a first regionand a second region, the first region is configured to emit a firstlight, the second region is outside the first region in each of thefirst unit region and the second unit region, the second region isconfigured to emit a second light, the second light is different fromthe first light in at least one of luminance, wavelength, orsurface-reflection component, the second region of the first unit regionand the second region of the second unit region are between adjacentfirst regions of the plurality of unit regions, and a first differencein one of luminance, wavelength, or surface-reflection component betweenthe second light to be emitted from adjacent unit regions of theplurality of unit regions is smaller than a second difference in arespective one of luminance, wavelength, or surface-reflection componentbetween the first light and the second light in a same unit region ofthe plurality of unit regions.